Dual positioning location system

Details Dual positioning location system Dual positioning location system

1995-03-27

1997-07-01

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

342457, 364453, 364454, G01S 502, G01S 302, G01C 2100

Patent

active

056443170

ABSTRACT:
An automatic vehicle location system (10) includes a radio positioning system receiver (14) which receives GPS radio signals (18) and includes a two-gimbaled gyroscope (22), which is used by a dead-reckoning positioning system. A controller (43) determines position based upon the radio positioning system when the radio signals (18) are available and upon dead-reckoning when the radio signals (18) are not available. The dead-reckoning process is based upon a compensation factor which is established in response to data received from the radio positioning system (14). The compensation factor acts as an adjustment to an inner gimbal angle to compensate for a minor drift away from level by the inner gimbal (32).

REFERENCES:
patent: 5241319 (1993-08-01), Shimizu
patent: 5272483 (1993-12-01), Kato

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